Fortress of Frederick II of Swabia, Castel del Monte, Andria, Western Murge, Barletta, Apulia, Italy, Europe

spiral staircase medieval architecture fortress stonework historical site andria apulia italy western murge craftsmanship heritage tourism unesco circular stairs interior design ancient travel destination sightseeing cultural landmark emilio historic structure exploration italian history castle monument walls visitor attraction steps architecture heritage site rustic structural design aesthetics artistry iconic beauty travel construction unique design masonry history scenic view building detail medieval period interesting architecture circular structure historical significance famous landmarks